There's just not enough information to say one way or the other. The Monster Podcast was interesting, though. Even accounting for level scaling, it seems a lot of monsters are designed to face higher level characters than before. Working of memory, you had..
3rd level Characters facing a single young white dragon or an equal number of hobgoblins.
An Owlbear as an elite heavy hitter vs 8th level characters. That's a big jump from being a mediocre monster vs 4th level characters.
You also had a Werewolf (CR3) and a Satyr (CR 2-4) vs the same party.
You had a Bone Devil as an elite leader of about 17th level, as opposed to being a CR 9 monster in 3rd edition.
It looks to me like the monsters are being dispersed over a greater number of levels than before. If a mere bone devil is 17th level, than a Balor has to be an Epic (20+) level threat.
On the other hand, you have Orcus in the first Monster Manual, who is undoubtedly an epic threat in both editions. So in terms of players vs monsters, you'll probably see a fairly even progression of monsters up to level 30, rather than 90% of monsters being 20 level or under, with a smattering of tacked on monsters for epic levels. The added levels should feel better integrated this way.
3rd level Characters facing a single young white dragon or an equal number of hobgoblins.
An Owlbear as an elite heavy hitter vs 8th level characters. That's a big jump from being a mediocre monster vs 4th level characters.
You also had a Werewolf (CR3) and a Satyr (CR 2-4) vs the same party.
You had a Bone Devil as an elite leader of about 17th level, as opposed to being a CR 9 monster in 3rd edition.
It looks to me like the monsters are being dispersed over a greater number of levels than before. If a mere bone devil is 17th level, than a Balor has to be an Epic (20+) level threat.
On the other hand, you have Orcus in the first Monster Manual, who is undoubtedly an epic threat in both editions. So in terms of players vs monsters, you'll probably see a fairly even progression of monsters up to level 30, rather than 90% of monsters being 20 level or under, with a smattering of tacked on monsters for epic levels. The added levels should feel better integrated this way.